The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 1988
Filed:
Nov. 21, 1986
Tetsuo Kimura, Tokyo, JP;
Nittan Co., Ltd., Tokyo, JP;
Abstract
A detector system having multiple sensors, each sensor detecting a different danger condition, has an address comparator for determining whether an access address coincident with a selected address is present in an access signal received from a central monitoring unit. The detector exchanges an information signal with the central monitoring unit using the coincidence detection signal of the address comparator. Success coincidence detection signals, corresponding to successively selected addresses being present in the access signal, are counted by a counter. If the detector has two sensors, the counter may be a D flip-flop circuit, and if the detector has more than two sensors, the counter may be a ring counter. The counter generates a signal for operating respective analog switches connected to the outputs of each sensor so as to successively through-connect the output of one sensor to the output of the detector system for transmittal to the central monitoring unit.